Wheels on 80 series cruisers

Chris, Your cruiser (80 series Std) came standard with 16 x 5.5 split rims. The "white rims" (Sunraysia?) would have been fitted by a previous owner. A problem with the dishing size?? do you mean offset? Not if the spare rim you have is an original. What you must make sure of is that the total diameter of the rim and tyre is the same as the others on your car. That is you should not have say a 33 inch diameter tyre on the rear left and a 32 inch tyre on the rear right. Cheers.